Plastic compound and process



' .plication UNlTEl) STATES PATENT OFFICE.

WILLIAM GODSON LINDSAY, OI NEWARK, NEW JERSEY, ASSIGNOR TO THE CELLU- LOID COMPANY, A CORPORATION 01 NEW JERSEY.

rmsrrc oomrounn AND rnocnss.

Specification of Lettersl'atent.

Patented Aug. 23, 1921.

No Drawing. Original application filed December 12, 1914, Serial No. 876,806. Patent No. 1,199,800.

' Divided. and this application filed September 1, 1816. Serial No.'118,002.

To aZZwhom it may concern:

Be it known that I, WILLIAM G. LINDSAY, a citizen of the United States, residin at Newark, in the county of Essex and tate of New Jersey, have invented certain new and useful Improvements in Plastic Gompounds and Processes, of which the followingris a full, clear, and exact specification.

his invention relates to cellulosecompounds such, as compounds of acetyl cellulose or other cellulosic ester of a fatty acid, and to the process of making the same. The com ounds are especially applicable for use as p otographic film, or to any other use in which a compound of more or less plastic nature is deslrable.

This ap lication is a division of my aperial No. 876,806, filed .December 12, 1914, now Patent No. 1,199,800, granted October 3, 1916.

Photographic film having nitro cellulose as a base is objectionable because of its inflammable nature. To overcome this objection applicant has successfully employed a base of acetyl cellulose with triphenylphosphate, asset forth in applicants previous Letters Patent No. 1,067,785, and others.

The object of the present invention is to produce a film of this character which shall have a high degree of toughness, flexibility and durability. v

To attain such result it is of importance that certain perculiar solvent action shall be had upon the acetyl cellulose, and that the form of the acetyl cellulose structure resulting therefrom shall be preserved or maintained in thefinished product.

In carrying out my invention, I use as a base that variety of acetyl cellulose or similar cellulosic ester which is soluble in acetone. The peculiar solvent action to which 1,050,065 and No.

I have referred is secured primarily by the use of a volatile chlorinated hydrocarbon (chloroform, dichlorethylene, eth lene chlorid) in combination with either et yl or methyl alcohol or both. The desired strucfore allowing the volatile constituents to eva orate.

uch high-boiling liquid should be sub-- stantially insoluble in water and liquid at ordinary temperatures, such as 20 to 25 0., and when the product is intended for photographic purposes the high-boiling. liquid should not react with the chemicals used in the chlorinated hydrocarbon-alcohol solvent,

and when the product is intended for photo graphic purposes the solid substance should not react with the chemicals used in photography. Camphor, borneol, sa1ol,diphenylamlne, diacetanilid, triphenyl-phosphate, or the like, may be used. I prefer triphenylphosphate because, in addition to the foreoing properties it imparts non-inflammail-ity and other desirable properties to the resultant product.

I have found that the best proportion of alcohol, 13. e., ethyl or methyl alcohol, to be added to the chlorinated hydrocarbon solvent is from five to fifteen parts, although in practice I prefer the proportion of eleven parts of ethyl alcohol to eight -nine parts by volume of the chlorinated ydrocarbon solvent.

A good proportion of high-boiling liquid is from five. to twent -five parts to one hundred parts of cellulosic ester, and a good proportion of solid substance is from five to,

twenty parts to 100 parts of cellulosic ester.

While there will be an appreciable variation in the degree of flexibility imparted to the resultant com und accordin particular high-boilin .li uid use nevertheless a high degree 0 flexibility and toughness will be attained by the use'of any of the following: fusel oil, amyl butyrate, amyl salicylate, oil of aniseed, benzyl alcohol, benzyl acetate, benzyl benzoate, benz l ether, benzoic ether, bornyl acetate, oil of camphor (heavy) carvene, oilof cedar leaves, 011 of cedarwood, oil of cinnamon aceto-dichlor. hydrin and substituted derivatives of the chlorhydrins, ethyl sebacate, oil of eucalypto the tol, methyl salicylate, nitro benzol, ntachlorethane, phenyl-ether, salicilate o benzyl, safrol, oil of Sassafras terpineol, amyl benzoate, amyl formate, oil of anise, anisic aldehyde, anisol, benzyl butyrate, benzyl formate oil of cam hor (lightg, carvol cinnamylic alcohol, 011 of citrone la, oil oi cloves, oi of eucal ptus, eu enol, ethyl cinnimate, oil of fennel geranio formate, eranyl acetate, oil of hedeoma, iso eugeno iso safrol, juniper berries (oilof), oil of mace, methyl cinnimate, methyl anthranilate, meth lene acetate, methyl nitrobenzoate, methyl 0 eate, ethyl oleate, methyl phenyl acetate, methyl benzoate, ethyl benzoate, 011 of nutmug, olenthic ether, oil of pennyro al, oil of eppermint, phenyl ethyl alco 01, oil ,0 inc needles, oil of rosemary, oil of rue, oil of sage, oil of s ike, oil of spruce, terpinyl acetate, oil 0 th me, amylacetate.

Also, these hig boiling liquidsmay be used either alone or in combination. For instance, I have discovered that a small proportion of amyl acetate, say, from four to seven parts to one hundred parts of cellulosic ester will give ood results in combination with 15 arts 0 fusel oil.

o0 example for working purposes is as f0 lows To 100 farts of cellulosic ester as herein specified add a sufiicient quantity of the c lorinated hydrocarbon-alcohol solvent to produce a fluid solution of whatever consistenc may be desired. I then add the hi h boilmg liquid and the soluble solid in t e proportions herein specified. For instance a good combination woud be 15 arts of ethyl sebacate and 1% parts of tnphenylphosphate. After a uniform and homogeneous solution has been made of these substances by stirring or other manipulative 1,ses,47a

means, the mixture is then worked up for films or other products according to the means which are well known to the art.

Havin thus described my invention, I declare t at what I claim as new and desire to secure by Letters Patent is 1. A com osition of matter containing an acetyl cellu ose, borneol, and a miscible medium.

2. A composition of matter containing an acetyl cellulose soluble in acetone, borneol and a miscible medium comprising a chlorinated hydrocarbon alcohol solvent.

3. A composition of matter containing a soluble acetyl cellulose, borneol, a high-boiling liquid and a chlorinated-hydrocarbon alcohol solvent.

'4. A. composition of matter containing a soluble acetyl cellulose, borneol, fusel oil and a chlorinated hydrocarbon alcohol solvent.

5. The process; of combining a soluble acetyl cellulose and borneol, which consists in dlssolving said substances in a chlorinated hydrocarbon alcohol solvent.

6. The rocess of combining an acetyl cellulose an borneol, which consists in dissolving said substances in a solvent comprising a mixture of a high boiling liquid and n chlorinated hydrocarbon alcohol solvent.

7. The process of combining a soluble acet l cellulose and borneol, which consists in issolving said substances in a solvent comprisin a mixture of'fusel oil and a chlorinate hydrocarbon alcohol solvent.

In testimon whereof I afiix my signature in presence 0 two witnesses.

WILLIAM GODSON LINDSAY.

Witnesses ELSIE GREENBERGER, C. GALvm. 

